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A eudicot from the Early Cretaceous of China

Abstract

The current molecular systematics of angiosperms1 recognizes the basal angiosperms and five major angiosperm lineages: the Chloranthaceae, the magnoliids, the monocots, Ceratophyllum and the eudicots, which consist of the basal eudicots and the core eudicots2. The eudicots form the majority of the angiosperms in the world today. The flowering plants are of exceptional evolutionary interest because of their diversity of over 250,000 species and their abundance as the dominant vegetation in most terrestrial ecosystems, but little is known of their very early history. In this report we document an early presence of eudicots during the Early Cretaceous Period. Diagnostic characters of the eudicot fossil Leefructus gen. nov. include simple and deeply trilobate leaves clustered at the nodes in threes or fours, basal palinactinodromous primary venation, pinnate secondary venation, and a long axillary reproductive axis terminating in a flattened receptacle bearing five long, narrow pseudo-syncarpous carpels. These morphological characters suggest that its affinities are with the Ranunculaceae, a basal eudicot family. The fossil co-occurs with Archaefructus sinensis3 and Hyrcantha decussata4 whereas Archaefructus liaoningensis5 comes from more ancient sediments. Multiple radiometric dates of the Lower Cretaceous Yixian Formation place the bed yielding this fossil at 122.6–125.8 million years old6,7,8. The earliest fossil records of eudicots are 127 to 125 million years old, on the basis of pollen9,10. Thus, Leefructus gen. nov. suggests that the basal eudicots were already present and diverse by the latest Barremian and earliest Aptian.

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Figure 1: Fossil locations.
Figure 2: The ages of the Yixian Formation, showing the fossil angiosperms and major vertebrates found there.
Figure 3: Holotype specimen of Leefructus mirus Sun, Dilcher, Wang et Chen.
Figure 4: Reconstruction of Leefructus mirus Sun, Dilcher, Wang et Chen.
Figure 5: Details of Leefructus mirus Sun, Dilcher, Wang et Chen.

References

  1. Qiu, Y.-L. et al. The earliest angiosperms: evidence from mitochondrial, plastid and nuclear genomes. Nature 402, 404–407 (1999)

    Article  ADS  CAS  Google Scholar 

  2. Moore, M. J. et al. Using plastid genome-scale data to resolve enigmatic relationships among basal angiosperms. Proc. Natl Acad. Sci. USA 104, 19363–19368 (2007)

    Article  ADS  Google Scholar 

  3. Sun, G. et al. Archaefructaceae, a new basal angiosperm family. Science 296, 899–904 (2002)

    Article  ADS  CAS  Google Scholar 

  4. Dilcher, D. L. et al. An early infructescence Hyrcantha decussata (comb. nov.) from the Yixian Formation in northeastern China. Proc. Natl Acad. Sci. USA 104, 9370–9374 (2007)

    Article  ADS  CAS  Google Scholar 

  5. Sun, G. et al. In search of the first flower: a Jurassic angiosperm, Archaefructus, from Northeast China. Science 282, 1692–1695 (1998)

    Article  ADS  CAS  Google Scholar 

  6. Zhang, H. et al. U-Pb isotopic age of the Lower Yixian Formation in Lingyuan of western Liaoning and its significance. Geol. Rev. 52, 63–71 (2006)

    CAS  Google Scholar 

  7. Swisher, C. C. et al. Cretaceous age for the feathered dinosaurs of Liaoning, China. Nature 400, 58–61 (1999)

    Article  ADS  CAS  Google Scholar 

  8. Meng, F. X., Gao, S. & Liu, X. M. U-Pb zircon geochronology and geochemistry of volcanic rocks of the Yixian Formation in the Lingyuan area, western Liaoning, China. Geol. Bull. China 27, 364–373 (2008)

    CAS  Google Scholar 

  9. Doyle, J. A. & Hotton, C. L. in Pollen and Spores: Patterns of Diversification (eds Blackmore, S. & Barnes, S. H. ) 169–195 (Clarendon Press, 1991)

    Google Scholar 

  10. Hughes, N. F. The Enigma of Angiosperm Origins (Cambridge University Press, 1994)

    Google Scholar 

  11. Crepet, W. L., Nixon, K. C. & Gandolfo, M. A. Fossil evidence and phylogeny: the age of major angiosperm clades based on mesofossil and macrofossil evidence from Cretaceous deposits. Am. J. Bot. 91, 1666–1682 (2004)

    Article  Google Scholar 

  12. Anderson, C. L., Bremer, K. & Friis, E. M. Dating phylogenetically basal eudicots using rbcL sequences and multiple fossil reference points. Am. J. Bot. 92, 1737–1748 (2005)

    Article  CAS  Google Scholar 

  13. Taylor, T. N., Taylor, E. L. & Krings, M. Paleobotany: The Biology and Evolution of Fossil Plants (Elsevier Science and Technology, 2008)

    Google Scholar 

  14. Chang, M. M. Jehol Biota [in Chinese] (Shanghai Sci. Tech. Press, 2001)

    Google Scholar 

  15. Ren, D. et al. Flower-associated brachycera flies as fossil evidence for Jurassic angiosperm origins. Science 280, 85–88 (1998)

    Article  ADS  CAS  Google Scholar 

  16. Zhou, Z., Barrett, P. M. & Hilton, J. An exceptionally preserved Lower Cretaceous ecosystem. Nature 421, 807–814 (2003)

    Article  ADS  CAS  Google Scholar 

  17. Peng, Y. D. et al. 40Ar/39Ar and K-Ar dating of the Yixian Formation volcanic rocks, western Liaoning Province, China. Geochimica 32, 427–435 (2003)

    CAS  Google Scholar 

  18. Angiosperm Phylogeny Group An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Bot. J. Linn. Soc. 161, 105–121 (2009)

    Article  Google Scholar 

  19. Barrett, P. M. Evolutionary consequences of dating the Yixian Formation. Trends Ecol. Evol. 15, 99–103 (2000)

    Article  CAS  Google Scholar 

  20. Chang, S.-C. et al. High-precision 40Ar/39Ar age for the Jehol Biota. Palaeogeogr. Palaeoclimatol. Palaeoecol. 280, 94–104 (2009)

    Article  Google Scholar 

  21. Swisher, C. C. et al. Further support for a Cretaceous age for the feathered-dinosaur beds of Liaoning, China: New dating of the Yixian and Tuchengzi Formations. Chin. Sci. Bull. 47, 136–139 (2002)

    Google Scholar 

  22. Wang, S. S. et al. Further discussion on the geological age of Sihetun vertebrate assemblage in western Liaoning, China: evidence from Ar-Ar dating. Acta Petrol. Sin. 7, 663–668 (2001)

    Google Scholar 

  23. Wang, W. et al. Phylogeny and classification of Ranunculales: evidence from four molecular loci and morphological data. Perspect. Plant Ecol. Evol. Syst. 11, 81–110 (2009)

    Article  Google Scholar 

  24. Doyle, J. A. et al. Angiosperm pollen from the pre-Albian Lower Cretaceous of equatorial Africa. Bull. Centres Recherches Exploration-Production Elf-Aquitaine 1, 451–473 (1977)

    Google Scholar 

  25. Doyle, J. A. Cretaceous angiosperm pollen of the Atlantic Coastal Plain and its evolutionary significance. J. Arnold Arbor. 50, 1–35 (1969)

    Article  Google Scholar 

  26. Leng, Q. & Friis, E. M. Sinocarpus decussates gen. et sp. nov., a new angiosperm with basally syncarpous fruits from the Yixian Formation of Northeast China. Plant Syst. Evol. 241, 77–88 (2003)

    Article  Google Scholar 

  27. Wikström, N., Savolainen, V. & Chase, M. W. Evolution of the angiosperms: calibrating the family tree. Proc. R. Soc. Lond. 268, 2211–2220 (2001)

    Article  Google Scholar 

  28. Bell, C. D., Soltis, D. E. & Soltis, P. S. The age of the angiosperms: a molecular timescale without a clock. Evolution 59, 1245–1258 (2005)

    Article  CAS  Google Scholar 

  29. Bell, C. D., Soltis, D. E. & Soltis, P. S. The age and diversification of the angiosperms re-revisited. Am. J. Bot. 97, 1296–1303 (2010)

    Article  Google Scholar 

  30. Smith, S. A., Beaulieu, J. M. & Donoghue, M. J. An uncorrelated relaxed-clock analysis suggests an earlier origin for flowering plants. Proc. Natl. Acad. Sci. USA 107, 5897–5902 (2010)

    Article  ADS  CAS  Google Scholar 

Download references

Acknowledgements

We acknowledge the support of the Key Lab of Evolution of Past Life and Environment in Northeast Asia, Ministry of Education, China, and Project “111” of China, NSFC project number 40842002, and the President Special Fund of Shenyang Normal University to carry out this research project during 2008–2009. Many thanks to S. M. Li and L. X. Wang for their help in collecting the fossil specimen. We thank Y. Duan, C. T. Li, Y. S. Liu, D. M .Jarzen, T. Lott, S. Trammel and W. Wang for their assistance in analysis, computer work, photography and artwork. We also thank P. and D. Soltis, K. Nixon, M. Moore and J. Doyle for suggestions.

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G.S. and D.L.D. designed the research plan. G.S., D.L.D., H.W. and Z.C. performed analysis. G.S., D.L.D. and H.W. wrote the manuscript. All authors discussed and commented on the manuscript.

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Correspondence to Ge Sun or David L. Dilcher.

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The authors declare no competing financial interests.

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Sun, G., Dilcher, D., Wang, H. et al. A eudicot from the Early Cretaceous of China. Nature 471, 625–628 (2011). https://doi.org/10.1038/nature09811

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